/**
 * Copyright © 2016-2019 The Thingsboard Authors
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.thingsboard.kafka;

import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.kafka.common.errors.SerializationException;
import org.apache.kafka.common.serialization.Deserializer;

import java.util.Map;

public class JsonPojoDeserializer<T> implements Deserializer<T> {
    private final ObjectMapper objectMapper = new ObjectMapper();

    private Class<T> clazz;

    public JsonPojoDeserializer(Class<T> clazz) {
        this.clazz = clazz;
    }

    @SuppressWarnings("unchecked")
    @Override
    public void configure(Map<String, ?> props, boolean isKey) {
        clazz = (Class<T>) props.get("JsonPojoClass");
    }

    @Override
    public T deserialize(String topic, byte[] bytes) {
        if (bytes == null)
            return null;

        T data;
        try {
            data = objectMapper.readValue(bytes, clazz);
        } catch (Exception e) {
            throw new SerializationException(e);
        }

        return data;
    }

    @Override
    public void close() {

    }
}
